Pith Number

pith:Q3LCATWN

pith:2013:Q3LCATWNFAJ2YLCA4UTK5MQI5S

not attested not anchored not stored refs pending

Pathologies in cohomology of non-paracompact Hausdorff spaces

Stefan Schroeer

arxiv:1309.2524 v1 · 2013-09-10 · math.AT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q3LCATWNFAJ2YLCA4UTK5MQI5S}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:13:44.383664Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86d6204ecd2813ac2c40e526aeb208ec9562e8621160739417073040757ff1ae

Aliases

arxiv: 1309.2524 · arxiv_version: 1309.2524v1 · doi: 10.48550/arxiv.1309.2524 · pith_short_12: Q3LCATWNFAJ2 · pith_short_16: Q3LCATWNFAJ2YLCA · pith_short_8: Q3LCATWN

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/Q3LCATWNFAJ2YLCA4UTK5MQI5S \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 86d6204ecd2813ac2c40e526aeb208ec9562e8621160739417073040757ff1ae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "120fa7797882427cecc24ebffb95fcb246a3cd172852e44a4a69287b85044a2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-09-10T14:25:51Z",
    "title_canon_sha256": "bad6fe412c65e0b99c4102c5f97ea5e4371f6561784a35619749d3309a0c9f87"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.2524",
    "kind": "arxiv",
    "version": 1
  }
}